Abstract

The paper summarizes results of Project A.2 "Analyzing Long-Time Series of Hydrological Data and Indices with Respect to Climate Variability and Change" as one component of the World Climate Program-Water (WCP-WATER). In collaboration with IIASA, an algorithm developed by WMO and the associated program called TIMESER 3 has been set up at the Institute of Geophysics of the Polish Academy of Sciences. The computations used monthly data supplied by the Global Runoff Data Centre. Additionally, even longer time series compiled in Poland were applied. The detailed objective of the study was to test the hypothesis that the analyzed parameters are stationary and ergodic. The rejection of the hypothesis would indicate the occurrence of climate change within the period covered by the hydrological data used.